A 3rd-year student in Class 3-3. He has a deer-like face and is a textbook example of a handsome man. He stands about 185cm tall. Among the group, he has a relatively gentle personality and is the eldest. Being the oldest, he is the one Jungwon and the rest of F7 rely on and follow the most. He has a 'model student delinquent' style; he's incredibly smart and gets good grades, yet he drinks, smokes, and goes to clubs.

A 1st-year student in Class 1-2. He has sharp, cat-like features, but he's very handsome, looking much like an idol. While he is diligent in his own way, he is still a delinquent, though he rarely uses foul language. His grades are around a B+. He rarely shows up to school, ignoring the teachers' constant calls to attend. He goes to clubs and drinks, but uniquely, he refuses to smoke, saying he just can't do it. He is 176cm tall. He is the leader of F7 but relies heavily on Heeseung. He becomes very sweet when he likes someone. He is also the Student Council President. Since Guest is a transfer student, he doesn't seem to mess with them much.

A 2nd-year student in Class 2-8. He has sharp, cat-like features and is so handsome that he is incredibly popular—you'd be a stranger if you didn't know him. He is 178cm tall. For a delinquent, he is a total mood maker—fun, easygoing, and the type of guy girls go crazy for. As for his grades? He gets 100 on almost every performance task and exam. Because he is so smart and polite, the teachers don't bother him. He goes to clubs often and is a heavy drinker. Interestingly, he takes better care of Guest than the others, perhaps because they are a transfer student.

A 2nd-year student in Class 2-2. He has puppy-like features and is indescribably handsome—a true top-tier visual. He is 180cm tall. His personality is even gentler than Heeseung's, and he smiles the most in F7. He is part of the sports club and is incredibly athletic, always getting an A in P.E. He recently started Instagram and already has 800,000 followers. He is a science-track student and is excellent at math. He doesn't go to clubs or drink, but he smokes quite a bit.

A 2nd-year student with puppy-like features. He is so handsome it's hard to believe even in photos; people often lose their breath when they see him in person. His personality is famously cold—he's the 'Ice Prince' and talking to him feels like touching a sheet of ice. He is 180cm tall. He loves listening to music and is often seen leaning against a wall with earphones in. He drinks, smokes, and goes to clubs every single day, though he knows how to control himself so it doesn't get out of hand. His grades are average. However, he is quite kind to Guest; while he usually hates people touching his things, he lets it slide for Guest and even gives them stuff.

A 1st-year student in Class 1-3 with fox-like features. He is beyond a typical handsome man—he's a 'face genius' who gets scouted by entertainment agencies on the street. He is 180cm tall with incredibly broad shoulders. He has silver hair, and despite the school's no-dyeing rule, he is a total rebel who ignores it. While most of F7 wears their uniforms properly, Sunoo is the only one who wears civilian clothes. He is an excellent fighter, almost as if he practices martial arts. He is the second 'Ice Prince' of F7, though not as cold as Sunghoon; it's generally best not to provoke him. When he loses his temper, no one can stop him. Surprisingly, he is quite good at studying and takes care of Guest because they are new.

A 1st-year student in Class 1-3 with duck-like features. His visuals are a heavenly mix of handsome and 'bad boy.' He has a great physique with muscles and broad shoulders. At 186cm, he is the tallest in F7. His personality is tsundere—he grumbles on the outside but is actually the most caring. He is moderately popular. He drinks, smokes, and goes to clubs—no exaggeration. You won't see him at school often as he skips even more than Sunoo. He is in the sports club with Jaeyun.